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Search Results: 1 - 10 of 120175 matches for " Wang Yichao "
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Agent-Oriented Architecture for Ubiquitous Computing in Smart Hyperspace  [PDF]
Yichao JIN, Ruchuan WANG, Haiping HUANG, Lijuan SUN
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.21011
Abstract: Agent-oriented approach is increasingly showing its magic power in a diversity of fields, specifically, ubiquitous computing and smart environment. Meanwhile, it is considered the next creative issue is to interconnect and integrate isolated smart spaces in real world together into a higher level space known as a hyperspace. In this paper, an agent-oriented architecture, which involves the techniques of mobile agents, middleware, and embedded artificial intelligence, is proposed. Detailed implementations describe our efforts on the design of terminal device, user interface, agents, and AI computi
Tax Contribution and Income Gap between Urban and Rural Areas in China  [PDF]
Yichao Yu
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.311023
Abstract: This article analyses the relationship of tax contribution and income gap between urban and rural areas. First of all, we comb their relationship from theoretical knowledge. Secondly, we use 2000- 2014 panel data of 29 provinces and cities in our country (except Tibet) to establish the fixed effects model for analysis. Results show that the improvement of tax contribution will expand the income gap between urban and rural areas. This is due to that turnover tax contribution is the most important part in the tax contribution. From the structural analysis, improvement of turnover tax and income tax contribution are not conducive to narrow the income gap between urban and rural areas. The improvement of property tax contribution is conducive to narrow the income gap between urban and rural areas. Finally, from the empirical results, we can give the policy suggestion of structural tax cuts and others.
Finite Element Analysis of Dam-Reservoir Interaction Using High-Order Doubly Asymptotic Open Boundary
Yichao Gao,Feng Jin,Xiang Wang,Jinting Wang
Mathematical Problems in Engineering , 2011, DOI: 10.1155/2011/210624
Abstract: The dam-reservoir system is divided into the near field modeled by the finite element method, and the far field modeled by the excellent high-order doubly asymptotic open boundary (DAOB). Direct and partitioned coupled methods are developed for the analysis of dam-reservoir system. In the direct coupled method, a symmetric monolithic governing equation is formulated by incorporating the DAOB with the finite element equation and solved using the standard time-integration methods. In contrast, the near-field finite element equation and the far-field DAOB condition are separately solved in the partitioned coupled methodm, and coupling is achieved by applying the interaction force on the truncated boundary. To improve its numerical stability and accuracy, an iteration strategy is employed to obtain the solution of each step. Both coupled methods are implemented on the open-source finite element code OpenSees. Numerical examples are employed to demonstrate the performance of these two proposed methods. 1. Introduction The coupled analysis of dam-reservoir interaction has great significance for the design and safety evaluation of concrete dams under earthquakes. The finite element method and substructure method are often applied for the analysis of dam-reservoir system (Figure 1). The dam structure as well as the near-field reservoir with irregular geometry is discretized with finite elements. The remaining part of the reservoir, called the far field, is simplified as a semi-infinite layer with constant depth. On the truncated boundary, which separates the near and far field, the equations of motion and continuity should be satisfied simultaneously. In the early studies, frequency-domain analysis methods [1, 2] are often used for linear problems. However, for a nonlinear analysis of the dam-reservoir system, it is necessary to develop a direct time domain analysis. Zienkiewicz and Bettess [3] as well as Kü?ükarslan et al. [4] studied fluid-structure interaction in the time domain by imposing the Sommerfeld radiation condition [5]. Tsai and his coworkers [6–8] established the time-domain models for the dynamic interaction analysis of dam-reservoir system by using the transmitting boundary. This approach is temporally global; that is, it requires the evaluation of convolution integrals. Boundary element method is undoubtedly a powerful numerical tool for analysis of problems involving unbounded domain. When the boundary element method [9–13] is applied to the direct time-domain analysis of dam-reservoir interaction, the formulation is temporally and spatially
A Research of Real-Time Pricing Mechanism and Its Characteristics  [PDF]
Yichao Dong, Bin Zou
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34033

Real-Time Pricing (RTP) is proposed as an effective Demand-Side Management (DSM) to adjust the load curve in order to achieve the peak load shifting. At the same time, the RTP mechanism can also raise the revenue of the supply-side and reduce the electricity expenses of consumers to achieve a win-win situation. In this paper, a real-time pricing algorithm based on price elasticity theory is proposed to analyze the energy consumption and the response of the consumers in smart grid structure. We consider a smart grid equipped with smart meters and two-way communication system. By using real data to simulate the proposed model, some characteristics of RTP are summarized as follows: 1) Under the condition of the real data, the adjustment of load curve and reducing the expenses of consumers is obviously. But the profit of power supplier is difficult to ensure. If we balance the profits of both sides, the supplier and consumers, the profits of both sides and the adjustment of load curve will be relatively limited. 2) If assuming the response degree of consumers to real-time prices is high enough, the RTP mechanism can achieve the expected effect. 3, If the cost of supply-side (day-ahead price) fluctuates dramatically, the profits of both sides can be ensured to achieve the expected effect.

Methane emissions during storage of di erent treatments from cattle manure in Tianjin

Jiajun Wang,Chiqing Duan,Yaqin Ji,Yichao Sun,

环境科学学报(英文版) , 2010,
Abstract: Many studies on methane emissions from animal manure have revealed that animal manure is a major source of methane emissions to the atmosphere that can have negative consequences for people, animals and environment. In general, the release of methane can be influenced by the type of feed taken by animals, temperature, manure characteristics and so on. This study aimed at quantifying and comparing methane release from dairy manure with di erent piling treatments. Four treatments were designed including manure piling height 30, 45, 60 cm and adding 6 cm manure every day until the piling height was 60 cm. Static chamber method and gas chromatography were adopted to measure the methane emissions from April to June in 2009. Methane emission rates of all four manure treatments were low in the first week and then increased sharply until reaching the peak values. Subsequently, all the methane emission rates decreased and fluctuated within the steady range till the end of the experiment. Wilcoxon nonparametric tests analysis indicated that methane emission rate was greatly influenced by manure piling height and manner. There were no significant relationships between methane emission rates and the temperatures of ambience and heap. However, regression analysis showed that the quadratic equations were found between emission rates of all treatments and the gas temperature in the barrels.
An Efficient Algorithm of Logarithmic Transformation to Hirota Bilinear Form of KdV-type Bilinear Equation
Yichao Ye,Lihong Wang,Zhaowei Chang,Jingsong He
Physics , 2011, DOI: 10.1016/j.amc.2011.07.036
Abstract: In this paper, an efficient algorithm of logarithmic transformation to Hirota bilinear form of the KdV-type bilinear equation is established. In the algorithm, some properties of Hirota operator and logarithmic transformation are successfully applied, which helps to prove that the linear terms of the nonlinear partial differential equation play a crucial role in finding the Hirota bilinear form. Experimented with various integro-differential equations, our algorithm is proven to be more efficient than the algorithm referred by Zhou, Fu, and Li in getting the Hirota bilinear form, especially in achieving the coefficient of the logarithmic transformation.
Experimental demonstration of a multiphysics cloak: manipulating heat flux and electric current simultaneously
Yungui Ma,Yichao Liu,Muhammad Raza,Yudong Wang,Sailing He
Physics , 2014, DOI: 10.1103/PhysRevLett.113.205501
Abstract: In past years, triggered by their successful realizations in electromagnetics, invisible cloaks have experienced rapid development and have been widely pursued in many different fields, though so far only for a single physical system. In this letter we made an unprecedented experimental attempt to show a multidisciplinary framework designed on the basis of two different physical equations. The proposed structure has the exceptional capability to simultaneously control two different physical phenomena according to the predetermined evolution scenarios. As a proof of concept, we implemented an electric-thermal bifunctional device that can guide both electric current and heat flux "across" a strong 'scatter' (air cavity) and restore their original diffusion directions as if nothing exists along the paths, thus rending dual cloaking effects for objects placed inside the cavity. This bifunctional cloaking performance is also numerically verified for a point-source nonuniform excitation. Our results and the fabrication technique presented here will help broaden the current research scope for multiple disciplines and may pave a prominent way to manipulate multiple flows and create new functional devices, e.g., for on-chip applications.
Model Independent Description of Amplification and Saturation Using Green's Function
Yichao Jing,Vladimir N. Litvinenko,Yue Hao,Gang Wang
Physics , 2015,
Abstract: High-gain Free Electron Laser (FEL) is one of the many electron-beam instabilities that have a number of common features linking the shot noise, the amplification and the saturation. In this paper, we present a new, model-independent description of the interplay between these effects. We derive a simple formula for a maximum attainable gain before instability saturates. Application of this model-independent formula to FELs is compared with FEL theory and simulations. We apply the limitations resulting from these findings to FEL amplifiers used for seeded FELs and for Coherent electron Cooling.
The Study of the Application Status of Fair Value Accounting in China
Yichao Liu
International Journal of Business and Management , 2010, DOI: 10.5539/ijbm.v5n9p155
Abstract: With more trade frictions as well as increasingly frequent and expanded trades between developed countries and China after its entry into WTO, fair value accounting has found its way even deeper into people’s hearts because it can reflect assets income and valid value of debt payment, offer exact information support for relevant decision makers, and more importantly, narrow the gap between China’s accounting standards and international ones as soon as possible. From the perspectives of concept, history of application, origin analysis and countermeasures, this paper conducts research and exploration into the application of fair value accounting in China.
p-adic Monodromy of the Universal Deformation of a HW-cyclic Barsotti-Tate Group
Yichao Tian
Mathematics , 2007,
Abstract: Let k be an algebraically closed field of characteristic $p>0$, and $G_0$ be a Barsotti-Tate group (or $p$-divisible group) over k. We denote by $S$ the "algebraic" local moduli in characteristic p of $G_0$, by $G$ the universal deformation of $G_0$ over $S$, and by $U\subset S$ the ordinary locus of $G$. The etale part of $G$ over $U$ gives rise to a monodromy representation $\rho$ of the fundamental group of $U$ on the Tate module of $G$. Motivated by a famous theorem of Igusa, we prove in this article that $\rho$ is surjective if $G_0$ is connected and HW-cyclic. This latter condition is equivalent to that Oort's $a$-number of $G_0$ equals 1, and it is satisfied by all connected one-dimensional Barsotti-Tate groups over $k$.
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